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u=t.getScrollHeight(),d=t.getClientHeight(),h=u-d-e;!t.optUp.isBounce&&h<=0&&t.preventDefault(o),t.optUp.use&&!t.optUp.isLock&&t.optUp.hasNext&&!t.isUpScrolling&&(!t.isDownScrolling||t.isDownScrolling&&t.optDown.isBoth)&&(d+t.optUp.offset>=u||h<=0)&&t.triggerUpScroll()}t.lastPoint=n}},t.scrollDom.addEventListener("touchmove",t.touchmoveEvent,{passive:!1}),t.touchendEvent=function(){t.optDown.use&&t.isMoveDown&&(t.downHight>=t.optDown.offset?t.triggerDownScroll():(t.downwarp.classList.add(t.optDown.resetClass),t.downHight=0,t.downwarp.style.height=0),t.isSetScrollAuto&&(t.scrollDom.style.webkitOverflowScrolling="touch",t.scrollDom.classList.remove(t.optDown.hardwareClass),t.isSetScrollAuto=!1),t.movetype=0,t.isMoveDown=!1),t.os.pc&&(t.scrollDom.removeEventListener("mousemove",t.touchmoveEvent),document.ondragstart=function(){return!0})},t.scrollDom.addEventListener("mouseup",t.touchendEvent),t.scrollDom.addEventListener("mouseleave",t.touchendEvent),t.scrollDom.addEventListener("touchend",t.touchendEvent),t.scrollDom.addEventListener("touchcancel",t.touchendEvent),t.optDown.use){t.downwarp=document.createElement("div"),t.downwarp.className=t.optDown.warpClass,t.downwarp.innerHTML='<div class="downwarp-content">'+t.optDown.htmlContent+"</div>";var o=t.optDown.warpId?t.getDomById(t.optDown.warpId):t.scrollDom;t.optDown.warpId&&o?o.appendChild(t.downwarp):(o||(o=t.scrollDom),o.insertBefore(t.downwarp,t.scrollDom.firstChild)),setTimeout((function(){t.optDown.inited(t,t.downwarp)}),0)}},t.prototype.preventDefault=function(t){t&&t.cancelable&&!t.defaultPrevented&&t.preventDefault()},t.prototype.getPoint=function(t){return{x:t.touches?t.touches[0].pageX:t.clientX,y:t.touches?t.touches[0].pageY:t.clientY}},t.prototype.triggerDownScroll=function(){this.optDown.beforeLoading(this,this.downwarp)||(this.showDownScroll(),this.optDown.callback&&this.optDown.callback(this))},t.prototype.showDownScroll=function(){this.isDownScrolling=!0,this.optDown.showLoading(this),this.downHight=this.optDown.offset,this.downwarp.classList.add(this.optDown.resetClass),this.downwarp.style.height=this.optDown.offset+"px"},t.prototype.endDownScroll=function(){var t=this,o=function(){t.downHight=0,t.downwarp.style.height=0,t.isDownScrolling=!1,t.downProgressDom&&t.downProgressDom.classList.remove("mescroll-rotate")},e=t.optDown.afterLoading(t);"number"===typeof e&&e>0?setTimeout(o,e):o()},t.prototype.lockDownScroll=function(t){null==t&&(t=!0),this.optDown.isLock=t},t.prototype.initUpScroll=function(){var t,o=this;(o.optUp=o.options.up||{use:!1},o.extendUpScroll(o.optUp),o.optUp.scrollbar.use&&o.scrollDom.classList.add(o.optUp.scrollbar.barClass),o.optUp.isBounce||o.setBounce(!1),!1!==o.optUp.use)&&(o.optUp.hasNext=!0,o.upwarp=document.createElement("div"),o.upwarp.className=o.optUp.warpClass,o.optUp.warpId&&(t=o.getDomById(o.optUp.warpId)),t||(t=o.scrollDom),t.appendChild(o.upwarp),o.preScrollY=0,o.lazyStartTime=(new Date).getTime(),o.lazyTag="mescroll-lazying",o.scrollEvent=function(){var t=o.getScrollTop(),e=t-o.preScrollY>0;if(o.preScrollY=t,!o.isUpScrolling&&(!o.isDownScrolling||o.isDownScrolling&&o.optDown.isBoth)&&!o.optUp.isLock&&o.optUp.hasNext){var n=o.getScrollHeight()-o.getClientHeight()-t;n<=o.optUp.offset&&e&&o.triggerUpScroll()}var i=o.optUp.toTop;if((i.src||i.html)&&(t>=i.offset?o.showTopBtn():o.hideTopBtn()),o.optUp.lazyLoad.use){var s=(new Date).getTime();o.lazyTimer&&clearTimeout(o.lazyTimer),s-o.lazyStartTime>=o.optUp.lazyLoad.delay?(o.lazyStartTime=s,o.lazyLoad(0)):o.lazyTimer=o.lazyLoad()}o.optUp.onScroll&&o.optUp.onScroll(o,t,e)},o.isScrollBody?window.addEventListener("scroll",o.scrollEvent):o.scrollDom.addEventListener("scroll",o.scrollEvent),setTimeout((function(){o.optUp.inited(o,o.upwarp)}),0))},t.prototype.setBounce=function(t){!this.isScrollBody&&this.os.ios&&(!1===t?(this.optUp.isBounce=!1,window.addEventListener("touchmove",this.bounceTouchmove,{passive:!1})):(this.optUp.isBounce=!0,window.removeEventListener("touchmove",this.bounceTouchmove)))},t.prototype.bounceTouchmove=function(t){var o=this,e=t.target,n=!0;while(e!==document.body&&e!==document){var i=e.classList;if(i){if(i.contains("mescroll")||i.contains("mescroll-touch")){n=!1;break}if(i.contains("mescroll-touch-x")||i.contains("mescroll-touch-y")){var s=t.touches?t.touches[0].pageX:t.clientX,l=t.touches?t.touches[0].pageY:t.clientY;o.preWinX||(o.preWinX=s),o.preWinY||(o.preWinY=l);var a=Math.abs(o.preWinX-s),r=Math.abs(o.preWinY-l),c=Math.sqrt(a*a+r*r);if(o.preWinX=s,o.preWinY=l,0!==c){var p=Math.asin(r/c)/Math.PI*180;if(p<=45&&i.contains("mescroll-touch-x")||p>45&&i.contains("mescroll-touch-y")){n=!1;break}}}}e=e.parentNode}n&&t.cancelable&&!t.defaultPrevented&&"function"===typeof t.preventDefault&&t.preventDefault()},t.prototype.triggerUpScroll=function(){this.optUp.callback&&!this.isUpScrolling&&(this.showUpScroll(),this.optUp.page.num++,this.isUpAutoLoad=!0,this.optUp.callback(this.optUp.page,this))},t.prototype.showUpScroll=function(){this.isUpScrolling=!0,this.upwarp.classList.add(this.optUp.hardwareClass),this.upwarp.style.visibility="visible",this.upwarp.style.display="block",this.optUp.showLoading(this,this.upwarp)},t.prototype.showNoMore=function(){this.upwarp.style.visibility="visible",this.upwarp.style.display="block",this.optUp.hasNext=!1,this.optUp.showNoMore(this,this.upwarp)},t.prototype.hideUpScroll=function(t){t?this.upwarp.style.display="none":this.upwarp.style.visibility="hidden",this.upwarp.classList.remove(this.optUp.hardwareClass);var o=this.upwarp.getElementsByClassName("upwarp-progress")[0];o&&o.classList.remove("mescroll-rotate")},t.prototype.endUpScroll=function(t,o){null!=t&&(t?this.showNoMore():this.hideUpScroll(o)),this.isUpScrolling=!1},t.prototype.resetUpScroll=function(t){if(this.optUp&&this.optUp.use){var o=this.optUp.page;this.prePageNum=o.num,this.prePageTime=o.time,o.num=1,o.time=null,this.isDownScrolling||!1===t||(null==t?(this.removeEmpty(),this.clearDataList(),this.showUpScroll()):this.showDownScroll()),this.isUpAutoLoad=!0,this.optUp.callback&&this.optUp.callback(o,this)}},t.prototype.setPageNum=function(t){this.optUp.page.num=t-1},t.prototype.setPageSize=function(t){this.optUp.page.size=t},t.prototype.clearDataList=function(){var t=this.optUp.clearId||this.optUp.clearEmptyId;if(t){var o=this.getDomById(t);o&&(o.innerHTML="")}},t.prototype.endByPage=function(t,o,e){var n;this.optUp.use&&null!=o&&(n=this.optUp.page.num<o),this.endSuccess(t,n,e)},t.prototype.endBySize=function(t,o,e){var n;if(this.optUp.use&&null!=o){var i=(this.optUp.page.num-1)*this.optUp.page.size+t;n=i<o}this.endSuccess(t,n,e)},t.prototype.endSuccess=function(t,o,e){var n=this;if(n.isDownScrolling&&n.endDownScroll(),n.optUp.use){var i;if(null!=t){var s=n.optUp.page.num,l=n.optUp.page.size;if(1===s&&(n.clearDataList(),e&&(n.optUp.page.time=e)),t<l||!1===o)if(n.optUp.hasNext=!1,0===t&&1===s)i=!1,n.showEmpty();else{var a=(s-1)*l+t;i=!(a<n.optUp.noMoreSize),n.removeEmpty()}else i=!1,n.optUp.hasNext=!0,n.removeEmpty()}var r=!n.optUp.hasNext;n.endUpScroll(i,r),n.loadFull(),n.optUp.lazyLoad.use&&n.lazyLoad(16)}},t.prototype.endErr=function(){if(this.isDownScrolling){var t=this.optUp.page;t&&this.prePageNum&&(t.num=this.prePageNum,t.time=this.prePageTime),this.endDownScroll()}this.isUpScrolling&&(this.optUp.page.num--,this.endUpScroll(!1))},t.prototype.loadFull=function(){var t=this;t.optUp.loadFull.use&&!t.optUp.isLock&&t.optUp.hasNext&&t.optUp.callback&&t.getScrollHeight()<=t.getClientHeight()&&setTimeout((function(){t.getScrollHeight()<=t.getClientHeight()&&t.triggerUpScroll()}),t.optUp.loadFull.delay)},t.prototype.lockUpScroll=function(t){null==t&&(t=!0),this.optUp.isLock=t},t.prototype.showEmpty=function(){var t=this,o=t.optUp.empty,e=o.warpId||t.optUp.clearEmptyId;if(null!=e){var n=t.getDomById(e);if(n){t.removeEmpty();var i="";if(o.icon&&(i+='<img class="empty-icon" src="'+o.icon+'"/>'),o.tip&&(i+='<p class="empty-tip">'+o.tip+"</p>"),o.btntext&&(i+='<p class="empty-btn">'+o.btntext+"</p>"),t.emptyDom=document.createElement("div"),t.emptyDom.className="mescroll-empty",t.emptyDom.innerHTML=i,n.appendChild(t.emptyDom),o.btnClick){var s=t.emptyDom.getElementsByClassName("empty-btn")[0];o.supportTap?s.addEventListener("tap",(function(e){e.stopPropagation(),t.preventDefault(e),o.btnClick()})):s.onclick=function(){o.btnClick()}}}}},t.prototype.removeEmpty=function(){this.removeChild(this.emptyDom)},t.prototype.showTopBtn=function(t){if(!this.topBtnShow){this.topBtnShow=!0;var o,e=this,n=e.optUp.toTop;if(null==e.toTopBtn)n.html?(e.toTopBtn=document.createElement("div"),e.toTopBtn.innerHTML=n.html):(e.toTopBtn=document.createElement("img"),e.toTopBtn.src=n.src),e.toTopBtn.className=n.warpClass,n.supportTap?e.toTopBtn.addEventListener("tap",(function(t){t.stopPropagation(),e.preventDefault(t);var o=n.btnClick&&n.btnClick();!0!==o&&e.scrollTo(0,e.optUp.toTop.duration)})):e.toTopBtn.onclick=function(){var t=n.btnClick&&n.btnClick();!0!==t&&e.scrollTo(0,e.optUp.toTop.duration)},n.warpId&&(o=e.getDomById(n.warpId)),o||(o=document.body),o.appendChild(e.toTopBtn);e.toTopBtn.classList.remove(n.hideClass),e.toTopBtn.classList.add(n.showClass),e.setTopBtnFadeDuration(t)}},t.prototype.hideTopBtn=function(t){this.topBtnShow&&this.toTopBtn&&(this.topBtnShow=!1,this.toTopBtn.classList.remove(this.optUp.toTop.showClass),this.toTopBtn.classList.add(this.optUp.toTop.hideClass),this.setTopBtnFadeDuration(t))},t.prototype.setTopBtnFadeDuration=function(t){if(this.toTopBtn){var o=(null!=t?t:this.optUp.toTop.fadeDuration)+"s";this.toTopBtn.style.animationDuration=o,this.toTopBtn.style.webkitAnimationDuration=o}},t.prototype.scrollTo=function(t,o){var e=this,n=e.getScrollTop(),i=t;if(i>0){var s=e.getScrollHeight()-e.getClientHeight();i>s&&(i=s)}else i=0;e.isScrollTo=!0,e.scrollDom.style.webkitOverflowScrolling="auto",e.getStep(n,i,(function(t){e.setScrollTop(t),t===i&&(e.scrollDom.style.webkitOverflowScrolling="touch",e.isScrollTo=!1)}),o)},t.prototype.getStep=function(t,o,e,n,i){var s=o-t;if(0!==n&&0!==s){n=n||300,i=i||30;var l=n/i,a=s/l,r=0,c=window.setInterval((function(){r<l-1?(t+=a,e&&e(t,c),r++):(e&&e(o,c),window.clearInterval(c))}),i)}else e&&e(o)},t.prototype.lazyLoad=function(t){var o=this,e=null!=t?t:o.optUp.lazyLoad.delay,n=setTimeout((function(){for(var t=o.scrollDom.querySelectorAll("["+o.optUp.lazyLoad.attr+"]"),e=t.length,n=0;n<e;n++){var i=t[n];if("true"!==i.getAttribute(o.lazyTag)&&o.isInSee(i,o.optUp.lazyLoad.offset)){var s=i.getAttribute(o.optUp.lazyLoad.attr),l=new Image;l.onload=function(){var t=this.src,e=this.dom,n=o.optUp.lazyLoad.showClass;n&&e.classList.add(n),"IMG"===e.tagName?e.src=t:e.style.backgroundImage="url("+t+")",e.removeAttribute(o.optUp.lazyLoad.attr),e.removeAttribute(o.lazyTag)},l.onerror=function(){this.dom.removeAttribute(o.lazyTag)},l.onabort=function(){this.dom.removeAttribute(o.lazyTag)},l.src=s,i.setAttribute(o.lazyTag,"true"),l.dom=i}}}),e);return n},t.prototype.isInSee=function(t,o){o=o||0;var e=this.getOffsetTop(t),n=this.getScrollTop()-o,i=e+t.offsetHeight,s=n+o+this.getClientHeight()+o;return e<s&&e>=n||i<=s&&i>n},t.prototype.getOffsetTop=function(t){var o=t.offsetTop,e=t.offsetParent;while(null!=e&&e!==this.scrollDom)o+=e.offsetTop+e.clientTop,e=e.offsetParent;return o},t.prototype.getScrollHeight=function(){return this.scrollDom.scrollHeight},t.prototype.getClientHeight=function(){return this.isScrollBody&&"CSS1Compat"===document.compatMode?document.documentElement.clientHeight:this.scrollDom.clientHeight},t.prototype.getBodyHeight=function(){return document.body.clientHeight||document.documentElement.clientHeight},t.prototype.getScrollTop=function(){return this.isScrollBody?document.documentElement.scrollTop||document.body.scrollTop:this.scrollDom.scrollTop},t.prototype.getToBottom=function(){return this.getScrollHeight()-this.getClientHeight()-this.getScrollTop()},t.prototype.setScrollTop=function(t){"number"===typeof t&&(this.isScrollBody?(document.documentElement.scrollTop=t,document.body.scrollTop=t):this.scrollDom.scrollTop=t)},t.prototype.getDomById=function(t){var o;return t&&("string"===typeof t?o=document.getElementById(t):t.nodeType&&(o=t)),o||console.error('the element with id as "'+t+'" can not be found: document.getElementById("'+t+'")==null'),o},t.prototype.removeChild=function(t){if(t){var o=t.parentNode;o&&o.removeChild(t),t=null}},t.prototype.destroy=function(){var t=this;t.scrollDom.removeEventListener("touchstart",t.touchstartEvent),t.scrollDom.removeEventListener("touchmove",t.touchmoveEvent),t.scrollDom.removeEventListener("touchend",t.touchendEvent),t.scrollDom.removeEventListener("touchcancel",t.touchendEvent),t.scrollDom.removeEventListener("mousedown",t.touchstartEvent),t.scrollDom.removeEventListener("mousemove",t.touchmoveEvent),t.scrollDom.removeEventListener("mouseup",t.touchendEvent),t.scrollDom.removeEventListener("mouseleave",t.touchendEvent),t.removeChild(t.downwarp),t.isScrollBody?window.removeEventListener("scroll",t.scrollEvent):t.scrollDom.removeEventListener("scroll",t.scrollEvent),t.removeChild(t.upwarp),t.removeChild(t.toTopBtn),t.setBounce(!0)},t}))}}]);